eu.lindenbaum.maven.util
Class ErlUtils

java.lang.Object
  eu.lindenbaum.maven.util.ErlUtils

public final class ErlUtils
extends Object

Containing utilities related to erlang code execution.

Author:

Tobias Schlager , Gregory Haskins

Constructor Summary

ErlUtils()

Method Summary

static String	toApplicationTuples(org.apache.maven.artifact.Artifact... artifacts) Returns a comma separated string of application version tuples taken from the given array of artifacts.
static String	toApplicationTuples(CheckAppResult... applicationInfos) Returns a comma separated string of application version tuples taken from the given array of CheckAppResults.
static String	toArtifactIdListing(Collection<org.apache.maven.artifact.Artifact> artifacts) Generates a simple comma separated list of applications derived from the artifacts listed as dependencies.
static String	toFilenameList(Collection<File> list, String prefix, String postfix) Converts a Collection of file objects into a string containing a valid erlang filename list.
static int	toInt(com.ericsson.otp.erlang.OtpErlangObject object) Converts an OtpErlangInt or an OtpErlangUInt into an int using the object specific conversion function.
static <T> String	toList(Collection<T> list, Predicate<T> p, String prefix, String postfix) Converts a Collection into a string containing a valid erlang list.
static <T> String	toList(T[] array, Predicate<T> p, String prefix, String postfix) Converts an array into a string containing a valid erlang list.
static String	toModuleList(Collection<File> list, String prefix, String postfix) Converts a Collection of erlang source or beam files into a string containing a valid erlang list of module names.
static String	toString(com.ericsson.otp.erlang.OtpErlangObject object) Converts an OtpErlangObject into a String using the object specific conversion function.
static String	toString(com.ericsson.otp.erlang.OtpErlangObject object, boolean trim) Converts an OtpErlangObject into a String using the object specific conversion function.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ErlUtils

public ErlUtils()

Method Detail

toList

public static <T> String toList(T[] array,
                                Predicate<T> p,
                                String prefix,
                                String postfix)

Converts an array into a string containing a valid erlang list.

Parameters:

array - to convert, maybe null

p - optional predicat whether to include a specific list element, maybe null

prefix - to prepend to an entry

postfix - to append to an entry

Returns:

a string representing a valid erlang list

toList

public static <T> String toList(Collection<T> list,
                                Predicate<T> p,
                                String prefix,
                                String postfix)

Converts a Collection into a string containing a valid erlang list.

Parameters:

list - to convert

p - optional predicat whether to include a specific list element, maybe null

prefix - to prepend to an entry

postfix - to append to an entry

Returns:

a string representing a valid erlang list

toFilenameList

public static String toFilenameList(Collection<File> list,
                                    String prefix,
                                    String postfix)

Converts a Collection of file objects into a string containing a valid erlang filename list. The list of files will be converted using File.getAbsolutePath(). The file entries will be checked for null and existence. The prefix and postfix Strings will be prepended/appended to every element of the list. This may be used to quote the returned paths correctly as erlang strings.

Parameters:

list - to convert

prefix - to prepend to an entry

postfix - to append to an entry

Returns:

a string representing a valid erlang list of filenames

toModuleList

public static String toModuleList(Collection<File> list,
                                  String prefix,
                                  String postfix)

Converts a Collection of erlang source or beam files into a string containing a valid erlang list of module names. The files will be checked for null and existence. The prefix and postfix Strings will be prepended/appended to every element of the list. This may be used to quote the module list correctly.

Parameters:

list - to convert

prefix - to prepend to an entry

postfix - to append to an entry

Returns:

a string representing a valid erlang list

toString

public static String toString(com.ericsson.otp.erlang.OtpErlangObject object)

Converts an OtpErlangObject into a String using the object specific conversion function. If there is no specific string conversion function available the default OtpErlangObject.toString() is used. Empty OtpErlangLists will result in an empty String. The returned String will be trimmed.

Parameters:

object - to convert

Returns:

a non-null, trimmed String object

toString

public static String toString(com.ericsson.otp.erlang.OtpErlangObject object,
                              boolean trim)

Converts an OtpErlangObject into a String using the object specific conversion function. If there is no specific string conversion function available the default OtpErlangObject.toString() is used. Empty OtpErlangLists will result in an empty String.

Parameters:

object - to convert

trim - whether the returned string will be trimmed

Returns:

a non-null, trimmed String object

toInt

public static int toInt(com.ericsson.otp.erlang.OtpErlangObject object)

Converts an OtpErlangInt or an OtpErlangUInt into an int using the object specific conversion function. If the conversion can't be performed, or throws an error during conversion, the value 0 is always returned.

Parameters:

object - to convert

Returns:

the object int value or 0 if unable to convert

toApplicationTuples

public static String toApplicationTuples(org.apache.maven.artifact.Artifact... artifacts)

Returns a comma separated string of application version tuples taken from the given array of artifacts. Result string will look like {"app1", "version1"}, {"app2", "version2"}, ....

Parameters:

artifacts - to convert into application version tuples

Returns:

a non-null String object

toApplicationTuples

public static String toApplicationTuples(CheckAppResult... applicationInfos)

Returns a comma separated string of application version tuples taken from the given array of CheckAppResults. Result string will look like {"app1", "version1"}, {"app2", "version2"}, ....

Parameters:

applicationInfos - to convert into application version tuples

Returns:

a non-null String object

toArtifactIdListing

public static String toArtifactIdListing(Collection<org.apache.maven.artifact.Artifact> artifacts)

Generates a simple comma separated list of applications derived from the artifacts listed as dependencies. Intended to be used to fill in ${APPLICATIONS} in ResourceGenerator.

Parameters:

artifacts - to convert into an artifactId listing

Returns:

a non-null String containing a valid erlang list